中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (11): 1641-1646.doi: 10.3969/j.issn.2095-4344.2014.11.001

• 神经组织构建 nerve tissue construction •    下一篇

热打击诱导氧化应激介导神经元凋亡过程中核因子κB的活化

刘云松1,邓旭斌2,霍少芬2,苏 磊3   

  1. 1南方医科大学研究生院,解放军广州军区广州总医院重症医学科,广东省广州市 510010;2南方医科大学肿瘤研究所,广东省广州市 510010;3解放军广州军区广州总医院重症医学科,广东省广州市 510010
  • 修回日期:2014-01-03 出版日期:2014-03-12 发布日期:2014-03-12
  • 通讯作者: 苏磊,博士,主任医师,解放军广州军区广州总医院重症医学科,广东省广州市 510010
  • 作者简介:刘云松,男,1972年生,江西省南昌市人,汉族,1995年解放军第一军医大学毕业,硕士,副主任医师,主要从事热射病相关脑损害研究。
  • 基金资助:

    国家自然科学基金(81071529,81101467);全军十二·五重点课题(BWS12J018)

Activation of nuclear factor kappa B during heat stress-induced neuronal apoptosis

Liu Yun-song1, Deng Xu-bin2, Huo Shao-fen2, Su Lei3   

  1. 1Graduate School, Southern Medical University, Department of Critical Care Medicine, General Hospital of Guangzhou Military Area Command of Chinese PLA, Guangzhou 510010, Guangdong Province, China; 2Cancer Research Institute, Southern Medical University, Guangzhou 510010, Guangdong Province, China; 3Department of Critical Care Medicine, General Hospital of Guangzhou Military Area Command of Chinese PLA, Guangzhou 510010, Guangdong Province, China
  • Revised:2014-01-03 Online:2014-03-12 Published:2014-03-12
  • Contact: Su Lei, M.D., Chief physician, Department of Critical Care Medicine, General Hospital of Guangzhou Military Area Command of Chinese PLA, Guangzhou 510010, Guangdong Province, China
  • About author:Liu Yun-song, Master, Associate chief physician, Graduate School, Southern Medical University, Department of Critical Care Medicine, General Hospital of Guangzhou Military Area Command of Chinese PLA, Guangzhou 510010, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81071529, 81101467; Military Key Project during the Twelfth Five-Year Plan, No. BWS12J018

摘要:

背景:大量研究显示高热可诱导机体细胞发生广泛凋亡,但对于高热如何介导神经元细胞凋亡并没有深入研究报道。

目的:检测热打击细胞模型中核因子κB信号通路对活性氧诱导细胞凋亡的影响。
方法使用细胞培养箱建立细胞热打击模型,热打击组分别将细胞置于39,41,43 ℃培养箱中进行热打击2 h,对照组(37 ℃组)将细胞置于标准37 ℃、体积分数5%CO2细胞培养箱。使用Annexin V-FITC/PI双染色方法检测不同温度热打击下神经元细胞凋亡率,Westen blot 检测caspase-3及抗-核因子КB65蛋白表达,DCFH法检测细胞内活性氧含量,同时检测活性氧抑制剂MnTMPyP及核因子κB抑制剂PDTC对热打击细胞凋亡的影响。

结果与结论:39 ℃热打击对细胞凋亡无影响,41 ℃热打击诱导细胞少量凋亡(10.19%),43 ℃热打击诱导诱导细胞大量凋亡(43.02%)。caspase-3和抗-核因子κB65蛋白的表达于热打击温度依赖的方式增加。MnTMPyP及PDTC均可有效阻断热打击引起的caspase-3、抗-核因子κB65蛋白的表达和细胞凋亡。结果证实热打击后细胞内活性氧增加诱导神经元细胞凋亡,提示核因子κB可能作为中间信号通路参与了热打击引起的细胞凋亡。



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 组织工程, 热打击, 神经元, 细胞凋亡, 核因子κB, 活性氧, caspase-3, 抗-核因子κB65蛋白, 国家自然科学基金

Abstract:

BACKGROUND: Hyperpyrexia can induce a wide range of cell apoptosis in organisms, but no study has introduced the mechanism of heat stress-induced neuronal apoptosis. 

OBJECTIVE: To observe the effect of nuclear factor kappa B (NF-κB) signal pathway on heat stress-induced neuronal apoptosis through reactive oxygen species.
METHODS: Heat stress model was established in the cell incubator. Heat stress group of cells were incubated at 39, 41, 43 ℃ for 2 hours, while control group of cells were incubated at 37 ℃ in 5% CO2 for 2 hours. Apoptosis was analyzed by flow cytometry using Annexin V-FITC/PI staining. The expression levels of caspase-3 and p-NF-κB65 were determined by western blot analysis. The amounts of intracellular reactive oxygen species were assayed by DCFH staining. In addition, the effect of MnTMPyP and PTDC on heat stress-induced apoptosis  was also studied.
RESULTS AND CONCLUSION: 39 ℃ heat stress had no impact on the apoptosis, 41 heat stress induced a small amount of apoptosis (10.19%), and 43 heat stress triggered a large amount of apoptosis (43.02%). The expression of caspase-3 and p-NF-κB65 was increased, in a temperature-dependent manner. In addition, both MnTMPyP and PTDC significantly decreased the heat stress-induced apoptosis and expression of caspase-3 and p-NF-κB65. Experimental findings indicate that, the increase of intracellular reactive oxygen species may induce neuronal apoptosis, and NF-κB participates in the heat stress-induced neuronal apoptosis as the intermedial signal pathway.


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words:  heat stroke, apoptosis, NF-kappa B

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